<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>flex布局</title>
    <link rel="stylesheet" href="../day05/common.css">
    <style>
        .main{
            display: flex;
            justify-content: center;
        }
        .main div{
            width: 300px;
            height: 60px;
            background-color: aqua;
            margin-bottom: 1px;
            
        }
    </style>
</head>
<body>
    <div class="main">
        <div class="box1"></div>
        <div class="box2"></div>
        <div class="box3"></div>
    </div>
</body>
</html>